Astronomical, Planetary, and Meteoritic Evidence Our Solar System Formed Under Intense UV Irradiation

Presenter: Steven Desch, Arizona State University
When: November 3, 2015 3PM PST

Evidence is mounting that our Solar System formed in a high-mass star-forming region with massive stars and was exposed to their intense far ultraviolet (FUV) radiation. I will present astronomical observations that indicate this is a common mode of star formation. I will discuss how the architecture of our solar system points to the Sun’s protoplanetary disk being sculpted by photoevaporation by FUV irradiation, and I will discuss meteoritic evidence from oxygen isotopes that also points to FUV irradiation. I will then discuss the effects that FUV irradiation had on volatile transport through our disk. I will present a model in which the noble gas abundances of Jupiter’s atmosphere also appear to require intense FUV photoevaporation, and I will discuss further possible effects on water 'snow lines’ in the solar nebula.

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